US20110169863A1 - Transmission terminal, display apparatus, image display transmission system provided with the transmission terminal and the display apparatus, and data transfer method implemented in the system - Google Patents

Transmission terminal, display apparatus, image display transmission system provided with the transmission terminal and the display apparatus, and data transfer method implemented in the system Download PDF

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Publication number
US20110169863A1
US20110169863A1 US12/998,120 US99812008A US2011169863A1 US 20110169863 A1 US20110169863 A1 US 20110169863A1 US 99812008 A US99812008 A US 99812008A US 2011169863 A1 US2011169863 A1 US 2011169863A1
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data
image
image data
section
display
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Yasuji Kawai
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Sharp NEC Display Solutions Ltd
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NEC Display Solutions Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2350/00—Solving problems of bandwidth in display systems
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/12—Frame memory handling
    • G09G2360/121—Frame memory handling using a cache memory

Definitions

  • the present invention relates to an image display system provided with a transmission terminal which transmits image data to a display apparatus via a network and the display apparatus which performs display with the use of the received image data, and a data transfer system implemented in the image display system.
  • a mobile terminal such as a mobile phone
  • a mobile terminal is provided with a variety of communication functions, and it becomes easier to connect to various information processing apparatuses in an office via a wireless LAN, a Bluetooth network or the like.
  • an information processor is caused to perform processing by an instruction from a mobile terminal. For example, it is conceivable to instruct printing of an image from a mobile terminal to a printer or to instruct projection of an image to a projector.
  • a technique for, when instructing a printer to print an image from a mobile terminal, displaying the image to be printed on the mobile terminal is disclosed, for example, in JP2006-163794A.
  • JP2006-163794A a large-size image assumed to be displayed on a personal computer is transmitted to a printer from a mobile terminal that is connected to the printer; the image received by the printer is reduced to a size which can be displayed on the mobile terminal and transmitted to the mobile terminal; and the reduced image is displayed on the mobile terminal.
  • An example can be given of a system that is used for a meeting or a presentation in which a mobile terminal instructs a projector to display an image from the mobile terminal.
  • multiple images the display order of which is predetermined are sequentially displayed.
  • a system user performs input specifying an image to be displayed, to a transmission terminal in which multiple image data to be displayed are accumulated, the specified image data is transmitted from the transmission terminal to the projector, and display based on the image data is performed by the projector.
  • a method in which a projector collectively accumulates multiple image data such as buffering, is adopted.
  • IDs indicating display order positions are given to multiple image data accumulated in a transmission terminal, and image data at display order positions after the currently displayed image data are collectively transmitted.
  • the present invention has been made in view of the problems of the related art, and it provides a technique for realizing a transmission terminal and a display apparatus, an image display transmission system provided with the transmission terminal and the display apparatus, and a data transfer method performed in the system which are capable of quickly performing image display.
  • the image display system is an image display system comprising a transmission terminal including an image accumulation section accumulating multiple image data the display order of which is specified, and a display apparatus connected to the transmission terminal via a network and including a cache data accumulation section accumulating multiple image data sent from the transmission terminal and a display device displaying images of the image data accumulated in the cache data accumulation section, wherein the display device displays a particular image in response to an instruction input to the transmission terminal to the effect that the particular image is to be displayed, the image display system being characterized in comprising:
  • a storage section accumulating a forward direction feeding mode, indicating the display order that is to be executed, and a backward direction feeding mode, indicating the display order that is to be executed is the reverse, in accordance with which the display order of the multiple image data is applied, and a control rule for each mode;
  • a data control section referring to contents accumulated in the cache data accumulation section and the mode and the control rule accumulated in the storage section to perform control so that image data at display order positions lower than the image data of a particular image currently displayed on the display device are accumulated in the cache data accumulation section.
  • the transmission terminal is a transmission terminal connected to a display apparatus including a cache data accumulation section accumulating received multiple image data and a display device displaying images of the image data accumulated in the cache data accumulation section via a network to constitute an image display system, the transmission terminal comprising an image accumulation section accumulating multiple image data the display order of which is specified and which are to be transmitted to the display apparatus and causing a particular image to be displayed on the display device in response to an instruction input to the effect that the particular image is to be displayed, and the transmission terminal being characterized in comprising:
  • a storage section accumulating a forward direction feeding mode, indicating the display order that is to be executed, and a backward direction feeding mode, indicating the display order that is to be executed is the reverse, in accordance with which the display order of the multiple image data is applied, and a control rule for each mode;
  • a data control section referring to contents accumulated in the cache data accumulation section and the mode and the control rule accumulated in the storage section to perform control so that image data at display order positions lower than the image data of a particular image currently displayed on the display device are accumulated in the cache data accumulation section.
  • the display apparatus is a display apparatus connected to a transmission terminal including an image accumulation section accumulating multiple image data the display order of which is specified, via a network, to constitute an image display system, and comprising a cache data accumulation section accumulating multiple image data sent from the transmission terminal and a display device displaying images of the image data accumulated in the cache data accumulation section, the display device displaying a particular image in response to an instruction input to the transmission terminal to the effect that the particular image is to be displayed, and the image display apparatus being characterized in comprising:
  • a storage section accumulating a forward direction feeding mode, indicating the display order that is to be executed, and a backward direction feeding mode, indicating the display order that is to be executed is the reverse, in accordance with which the display order of the multiple image data is applied, and a control rule for each mode;
  • a data control section referring to contents accumulated in the cache data accumulation section and the mode and the control rule accumulated in the storage section to perform control so that image data at display order positions lower than the image data of a particular image currently displayed on the display device are accumulated in the cache data accumulation section.
  • the data transmission method is a data transmission method implemented in an image display system comprising a transmission terminal including an image accumulation section accumulating multiple image data the display order of which is specified, and a display apparatus connected to the transmission terminal via a network and including a cache data accumulation section accumulating multiple image data sent from the transmission terminal and a display device displaying images of the image data accumulated in the cache data accumulation section, wherein the display device displays a particular image in response to an instruction input to the transmission terminal to the effect that the particular image is to be displayed, the method being characterized in comprising:
  • a forward direction feeding mode indicating the display order that is to be executed
  • a backward direction feeding mode indicating the display order that is to be executed is the reverse, in accordance with which the display order of the multiple image data is applied, and a control rule for each mode
  • a data control section refers to contents accumulated in the cache data accumulation section and the mode and the control rule accumulated in the storage section to perform control so that image data at display order positions lower than the image data of a particular image currently displayed on the display device are accumulated in the cache data accumulation section.
  • FIG. 1 is a block diagram showing the configuration of main components of a first exemplary embodiment
  • FIGS. 2( a ) and 2 ( b ) are diagrams showing examples of display on display section 105 in FIG. 1 and show an image data list screen and thumbnails, respectively;
  • FIG. 3 is a diagram showing an example of the configuration of image data management table 112 in FIG. 1 ;
  • FIG. 4 is a flowchart showing an operation performed when data control section 103 in FIG. 1 sets a state mode
  • FIG. 5 is a flowchart showing an operation of controlling data performed by data control section 103 ;
  • FIG. 6 is a flowchart showing the operation of an image data transmission process shown in FIG. 5 ;
  • FIGS. 7( a ) and 7 ( b ) are diagrams showing content stored in cache management table 113 ;
  • FIG. 8 is a diagram showing content stored in cache data accumulation section 211 ;
  • FIG. 9 is a flowchart showing the operation of a forward-direction feeding process performed at step S 504 in FIG. 5 ;
  • FIG. 10 is a block diagram showing the configuration of main components of a first exemplary embodiment.
  • FIG. 1 is a block diagram showing the configuration of main components of a first exemplary embodiment.
  • Transmission terminal 1 is provided with UI (user interface) section 101 , UI monitoring section 102 , data control section 103 , data transmission section 104 , display section 105 , network connection section 106 , storage section 107 , image data accumulation section 111 , image data management table 112 and a cache management table 113 .
  • UI user interface
  • Display apparatus 2 is provided with data output section 201 , data management section 202 , data receiving section 203 , display device 204 and cache data accumulation section 211 .
  • Image data management table 112 manages the order of displaying the multiple images accumulated in image data accumulation section 111 .
  • Cache data accumulation section 211 of display apparatus 2 is for accumulating multiple image data transmitted from transmission terminal 1 , and the accumulated contents are managed by cache management table 113 of transmission terminal 1 .
  • UI section 101 receives a control input or a key input to an operation screen by a user operation.
  • UI monitoring section 102 monitors the contents of an input by a user operation via UI section 101 and outputs a signal indicating the contents of the input to data control section 103 .
  • Data control section 103 performs transmission of the image data accumulated in the image data accumulation section and control of the contents accumulated in cache data accumulation section 211 according to the contents of the input to UI section 101 shown in output of UI monitoring section 102 , and a state mode and control rules accumulated in storage section 107 .
  • data control section 103 transmits image data specified by the image data transmission request and realizes an image data feeding function.
  • the state mode accumulated in storage section 107 is updated according to the contents of the input.
  • data transmission section 104 transmits various kinds of command data to display apparatus 2 via network 3 .
  • Display section 105 performs display; network connection section 106 performs an operation of connecting to network 3 ; and storage section 107 stores a state mode and control rules.
  • Data receiving section 203 receives command data transmitted from data transmission section 104 of transmission terminal 1 via the network.
  • Data management section 202 performs processing of various kinds of commands handed over from data receiving section 203 , and data output section 201 displays data on the display device in response to a request by data management section 202 .
  • a device for displaying an image which is used for presentation in a meeting room or the like such as a projector, is assumed to be display apparatus 2 .
  • the explanatory material is displayed with the use of image data showing the explanatory material.
  • one item of image data constitutes one screen (page) on display apparatus 2 for simplification of explanation.
  • a page control operation for feeding the material page by page in a forward direction is expressed as “forward feeding”, and an operation of going back by one page is expressed as “backward feeding”.
  • Other page controls include jump to a specified page and the like.
  • Image display command a command ID and a cache number.
  • Cache registration command a command ID, a registration-destination cache number and image data
  • Cache deletion command a command ID and a deletion-destination cache number
  • an image transmission function is realized by the operation below.
  • data control section 103 causes display section 105 to display an image data list screen as shown in FIG. 2 ( a ).
  • FIG. 2( a ) five folders Data_ 1 to Data_ 5 are presented.
  • thumbnails as shown in FIG. 2( b ) are displayed.
  • the thumbnails shown in FIG. 2( b ) are displayed on the basis of the image data accumulated in image data accumulation section 111 , and any one of the five folders is in a state of focus that is displayed in an enlarged form.
  • image data of a currently focused thumbnail is transmitted to display apparatus 2 , and the focus moves to the thumbnail of the next image data. Then, each time a transmission input is performed, transmission of image data of a focused thumbnail is performed, and the page is fed forward.
  • Data control section 103 refers to image data accumulation section 111 and image data management table 112 which is a management table of image data accumulation section 111 , displays and controls the image data list screen shown in FIG. 2( a ), the thumbnail screen shown in FIG. 2( b ) and the like, and causes the operator to select image data to be transmitted.
  • UI section 101 When the operator selects image data and performs a transmission input, UI section 101 requests data control section 103 to transmit the selected image data.
  • FIG. 3 shows an example of the configuration of image data management table 112 .
  • a display order, image IDs uniquely assigned to images, locations of image data are managed.
  • UI monitoring section 102 monitors operations exchanged between UI section 101 and the operator and sets the following three state modes for storage section 107 .
  • Forward feeding a state in which an operator continuously performs forward-direction page feeding
  • Backward feeding a state in which an operator continuously performs backward-direction page feeding
  • FIG. 4 is a flowchart showing an operation performed when data control section 103 sets a state mode.
  • the state mode is updated, with a page control operation performed as a trigger after three seconds or more have passed after the previous page control operation.
  • data control section 103 resets a timer (not shown) provided for transmission terminal 1 and sets the state mode as “forward feeding” for storage section 107 (step S 401 ).
  • a timer not shown
  • the state mode as “forward feeding” for storage section 107
  • step S 401 it is confirmed by an output from UI monitoring section 102 whether an operation of controlling a page feeding operation has been performed on UI section 101 (step S 402 ). If the operation has not been performed, the timer is reset (step S 412 ), and it is confirmed again whether the operation of controlling a page feeding operation has been performed on UI section 101 .
  • step S 402 If it is confirmed at step S 402 that the operation of controlling a page feeding operation has been performed on UI section 101 , the timer is read (step S 403 ), and it is confirmed whether three seconds or more have passed (step S 404 ). If three seconds or more have not passed, the timer is reset (step S 412 ), and it is confirmed again whether the operation of controlling a page feeding operation has been performed on UI section 101 .
  • step S 404 If it is confirmed at step S 404 that three seconds or more have passed, it is confirmed whether the performed page feeding operation control is “forward feeding” (step S 405 ).
  • step S 405 If it is confirmed at step S 405 that the performed page feeding operation control is “forward feeding”, it is confirmed whether the mode set for storage section 105 is “forward feeding” or “pending” (step S 406 ).
  • step S 406 If it is confirmed at step S 406 that the mode set for storage section 105 is “forward feeding” or “pending”, the state mode is set to “forward feeding” (step S 407 ), the timer is reset (step S 412 ), and it is confirmed again whether the operation of controlling a page feeding operation has been performed on UI section 101 .
  • step S 405 If it is confirmed at step S 405 that the performed page feeding operation control is not “forward feeding”, it is confirmed whether the performed page feeding operation control is “backward feeding” (step S 408 ), and it is confirmed whether the mode set for storage section 105 is “backward feeding” or “pending” (step S 409 ).
  • step S 406 If it is confirmed at step S 406 that the mode set for storage section 105 is not “forward feeding” or “pending”, if it is confirmed at step S 408 that the performed page feeding operation control is not “backward feeding”, or if it is confirmed at step S 409 that the mode set for storage section 105 is not “backward feeding” or “pending”, the state mode is set to “pending” (step S 410 ), the timer is reset (step S 412 ), and it is confirmed again whether the operation of controlling a page feeding operation has been performed on UI section 101 .
  • step S 408 If it is confirmed at step S 408 that the performed page feeding operation control is “backward feeding”, and if it is confirmed at step S 409 that the mode set for storage section 105 is “backward feeding” or “pending”, the state mode is set to “backward feeding” (step S 411 ), the timer is reset (step S 412 ), and it is confirmed again that the operation of controlling a page feeding operation has been performed on UI section 101 .
  • FIG. 5 is a flowchart showing the control operation by data control section 103
  • FIG. 6 is a flowchart showing the operation of an image data transmission process shown in FIG. 5 .
  • Data control section 103 confirms whether an image data transmission request has been made to UI section 101 by an output of UI monitoring section 102 (step S 501 ). If the image data transmission request is made, the image data transmission process shown in FIG. 6 is performed, and it is confirmed again whether an image data transmission request has been performed.
  • step S 501 If it is confirmed at step S 501 that an image data transmission request has not been performed, the mode set for storage section 105 is read (step S 502 ), it is confirmed whether the mode is “forward feeding” (step S 503 ), and it is confirmed whether the mode is “backward feeding” (step S 506 ).
  • step S 503 If it is confirmed at step S 503 that the mode is “forward feeding”, data control section 103 performs a process for feeding the page in a forward direction (step S 504 ), returns to step 501 and confirms whether an image data transmission request has been made.
  • step S 506 data control section 103 performs a process for feeding the page in a backward direction (step S 507 ), returns to step 501 and confirms whether an image data transmission request has been made.
  • data control section 103 When receiving an image data transmission request (step S 601 ), data control section 103 refers to cache management table 113 (step S 602 ) to confirm whether image data specified by the image data transmission request exists on cache data accumulation section 211 of display apparatus 2 (step S 603 ).
  • FIGS. 7( a ) and 7 ( b ) is a diagram showing the contents stored in cache management table 113 . It is seen that the cache has enough capacity to accumulate images corresponding to five pages.
  • Cache management table 113 is constituted by cache numbers for identifying operation target cache data, image IDs for identifying images, and display flags for identifying an image currently displayed.
  • FIG. 7( a ) indicates a state in which an image with a cache number 1 and an image ID img 001 is displayed.
  • FIG. 7( b ) indicates a state in which an image with a cache number 2 and an image ID img 002 is displayed.
  • step S 605 If it is confirmed at step S 603 that the image data that has been requested to be transmitted does not exist in the cache, cache control is performed (step S 605 ). The cache control performed here will be described later.
  • step S 603 If it is confirmed at step S 603 that the image data that has been requested to be transmitted exists in the cache, a request to transmit an image display command is made to data transmission section 104 after step S 605 , and data transmission section 104 accepts the request from data control section 103 and transmits the image display command to display apparatus 2 (step S 604 ).
  • data receiving section 203 of display apparatus 2 hands it over to data management section 202 .
  • data management section 202 reads image data shown in the image display command from cache data accumulation section 211 and instructs data output section 201 to display it.
  • Data output section 201 displays it on a display device (not shown).
  • step S 603 If it is confirmed at step S 603 that the image data that has been requested to be transmitted does not exist in cache data accumulation section 211 , data control section 103 confirms whether there is space in cache data accumulation section 211 . If there is sufficient capacity, data control section 103 refers to image data management table 112 , creates a cache registration command, transmits it to display apparatus 2 via data transmission section 104 , and updates cache management table 113 .
  • data control section 103 transmits a cache deletion command to make space to secure a cache area. After that, data control section 103 transmits a cache registration command to display apparatus 2 via data transmission section 104 similarly and updates cache management table 113 .
  • the data cache which is to be deleted is determined in accordance with control rules for feeding to be described later.
  • data receiving section 203 of display apparatus 2 hands it over to data management section 202 .
  • Data management section 202 registers a cache number and image data shown in the received cache registration command with cache data accumulation section 211 .
  • FIG. 8 is a diagram showing the contents stored in cache data accumulation section 211 . As shown in the figure, image data are stored in association with cache numbers.
  • FIG. 9 is a flowchart showing the operation of a forward-direction feeding process performed at step S 504 in FIG. 5 . The operation will be described below with reference to FIG. 9 . The control rules below are assumed to be applied to the feeding process.
  • data control section 103 refers to image data management table 112 , selects the next feeding candidate (step S 801 ), and then refers to cache management table 113 (step S 802 ).
  • data control section 103 confirms whether there is space in cache data accumulation section 211 (step S 803 ) and, if there is space, creates a cache registration command (S 804 ).
  • Data control section 103 transmits the cache registration command to display apparatus 2 via data transmission section 104 , updates cache management table 113 (step S 805 ) and ends the process.
  • step S 803 If it is confirmed at step S 803 that there is no space in cache data accumulation section 211 , it is confirmed whether there is cache data to be deleted, in accordance with the control rules (step S 806 ).
  • step S 806 If it is confirmed at step S 806 that there is no data to be deleted, data control section 103 ends the process.
  • step S 806 If it is confirmed at step S 806 that there is data which can be deleted, data control section 103 creates a cache deletion command (step S 807 ), transmits it to display apparatus 2 via the transmission section, updates cache management table 113 (step S 808 ), and proceeds to step S 804 .
  • data receiving section 203 of display apparatus 2 hands it over to data management section 202 .
  • Data management section 202 discards the data of a cache number shown in the handed-over cache deletion command and updates cache data accumulation section 211 .
  • data receiving section 203 of display apparatus 2 hands it over to data management section 202 .
  • Data management section 202 registers a cache number and image data shown in the handed-over cache registration command with cache data accumulation section 211 .
  • Data control section 103 performs an operation as described below.
  • data control section 103 creates a cache registration command for img 06 , transmits it to the display apparatus via the data transmission section, and updates cache management table 113 .
  • Cache management table 113 in this state is shown in FIG. 7( b ).
  • control rules are only an example.
  • another rule is also conceivable in which at least one page before and after a currently displayed image is left in the cache.
  • control rules it is also possible to prepare multiple control rules and present the contents of the control rules to a user via UI section 101 to cause the user to select a control rule suitable for the user's style of performing an operation, and such a configuration may be made.
  • FIG. 10 is block diagram showing main components thereof.
  • cache data management and data feeding management functions are implemented on the transmission terminal side in the first exemplary embodiment, those functions are implemented on the display apparatus side in this exemplary embodiment.
  • This exemplary embodiment is configured by network 53 , transmission terminal 31 and display apparatus 42 which can transmit and receive data via network 53 .
  • UI section 301 , UI monitoring section 302 , data control section 303 , data transmission section 304 , display section 305 , network connection section 306 , storage section 307 , image data accumulation section 311 and image data management table 312 constituting transmission terminal 31 , and data output section 401 , data management section 402 , data receiving section 403 , display device 405 and cache data accumulation section 412 constituting display apparatus 42 perform operations similar to those of UI section 101 , UI monitoring section 102 , data control section 103 , data transmission section 104 , display section 105 , network connection section 106 , storage section 107 , image data accumulation section 111 and image data management table 112 constituting transmission terminal 1 , and data output section 201 , data management section 202 , data receiving section 203 , display device 204 and cache data accumulation section 211 constituting display apparatus 2 which are shown in FIG. 1 , respectively.
  • the cache management table provided on the transmission terminal side in the first exemplary embodiment is cache management table 411 provided in display apparatus 42 .
  • Data control section 303 refers to cache management table 411 via network 53 to confirm the contents stored in cache data accumulation section 412 .
  • Other control operations are similar to those in the first exemplary embodiment.
  • the state mode is the forward feeding mode at the initial state and determined by the data control section in accordance with the contents of an input to the UI section afterwards, it may be directly set by a user.
  • any of the cache management table, the data control section and the storage section may be provided in any of the transmission terminal and the display apparatus constituting the image display system.

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  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Information Transfer Between Computers (AREA)
  • Controls And Circuits For Display Device (AREA)
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